80000005640

素因数分解:

$2^3\times 5^1\times {\mathrm{2000000141}}^1$

素因数の和:2000000152

約数の個数: 16

約数和(自身を含む): 180000012780

約数和(自身を除く): 100000007140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2000000141, 4000000282, 8000000564, 10000000705, 16000001128, 20000001410, 40000002820, 80000005640]

約数ペア:

[(1, 80000005640), (2, 40000002820), (4, 20000001410), (5, 16000001128), (8, 10000000705), (10, 8000000564), (20, 4000000282), (40, 2000000141)]